The melanocyte-stimulating hormones (collectively referred to as MSH or intermedins) are a class of peptide hormones that in nature are produced by cells in the intermediate lobe of the pituitary gland. They were first isolated by the Yale professor Aaron B. Lerner. Synthetic analogs of these naturally occurring hormones have also been developed and researched. Synonyms: Polyclonal alpha Melanocyte Stimulating Hormone antibody, Anti alpha Melanocyte Stimulating Hormone antibody.